(1) A sender identification is one or more of the things covered by subsection (2) that is a message header that is, or is to be, used in a communication that is, or is to be, sent using any of the following services:
(a) a short message service;
(b) a multimedia message service;
(c) if another service is specified in an instrument under subsection (4)--that other service.
(2) This subsection covers the following things:
(a) letters;
(b) numbers;
(c) symbols;
(d) if another thing is specified in an instrument under subsection (5)--that other thing.
(3) Despite subsection (1), a message header is not a sender identification if the message header consists only of numbers.
(4) The Minister may, by legislative instrument, specify a service for the purposes of paragraph (1)(c).
(5) The Minister may, by legislative instrument, specify a thing for the purposes of paragraph (2)(d).